72421060 has 24 divisors (see below), whose sum is σ = 152746776. Its totient is φ = 28842240.

The previous prime is 72421009. The next prime is 72421067. The reversal of 72421060 is 6012427.

It can be written as a sum of positive squares in 4 ways, for example, as 6843456 + 65577604 = 2616^2 + 8098^2 .

It is not an unprimeable number, because it can be changed into a prime (72421067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3111 + ... + 12430.

It is an arithmetic number, because the mean of its divisors is an integer number (6364449).

Almost surely, 2^72421060 is an apocalyptic number.

It is an amenable number.

72421060 is an abundant number, since it is smaller than the sum of its proper divisors (80325716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72421060 is a wasteful number, since it uses less digits than its factorization.

72421060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15783 (or 15781 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 72421060 is about 8510.0564040434. The cubic root of 72421060 is about 416.8261519247.

Adding to 72421060 its reverse (6012427), we get a palindrome (78433487).

The spelling of 72421060 in words is "seventy-two million, four hundred twenty-one thousand, sixty".